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In: Statistics and Probability

How well materials conduct heat matters when designing houses, for example. Conductivity is measured in terms...

How well materials conduct heat matters when designing houses, for example. Conductivity is measured in terms of watts of heat power transmitted per square meter of surface per degree Celsius of temperature difference on the two sides of the material. In these units, glass has conductivity about 1. The National Institute of Standards and Technology provides exact data on properties of materials. Here are 11 measurements of the heat conductivity of a particular type of glass:

Conductivity   1.22 0.92 1.16 1.07 1 1.24 0.97 1.18 1.25 1.01 0.97

The mean (±0.001) and the standard deviation (±0.0001) of the SRS are:   
x¯¯¯x¯ = s = .


The critical value (±0.001) from the distribution for 90% confidence interval is:   
t* = .


The 90% confidence interval (±0.001) for the mean conductivity is
from     to    .

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orchestra answered 2 years ago
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